Structural column



Marchz, 1940. G HDEAN 2,195,327'

STRUCTURAL COLUMN Filed Feb. 2, 1939 L somewhat eccentrically upon thecolumn.

present practice is to cut away a part of the casing to form a slottherethrough' into which Athe Patented Mar. 26,1940.` l.

UNITED STA'IIIS;` PATENT OFFICE vs'rRUC'riUl'mL COLUMN y George -H.`Dean, Norwood,` RI. l Applicationrebruary 2, 1939, serial No. 254,202 1claim. `(o1. 1s'9 42) `This inventionrelates toa structural column andmore particularly to such a column having one or more supporting platessecured thereto.

Columns made by filling metalcasings with concrete have been used foryears as structural supports. kIt has also been customary to attachvertical supporting plates of one form or another to these casings tohelp support top plates,fbeams or girders, especially where a load maybe imposed The aforesaid vertical supportingY plates can vbe inserted.This slotting of the casing is generally recognized as of weakeningeiect in that it actually removes a part of the metal. And where theslots are formed at the very endfof the casing not only is the endweakened by the aforesaid re-4 moval of the metal but the remainingseparated portions of the column arequite likely to spread apart underthe continued stress of the load. To

prevent this, various devices have been provided to encircle the splitor'slotted ends and thereby prevent the spreading of the sections.expedient adopted for the same purpose, as disclosed in the Lally Patent1,539,580 of May 28, 1925, and in the Peterson Patent 1,604,931 ofOctober 26, 1926, is to weld the edgesof the slots to the supportingplate inserted therein but this at best only permits a limited llet or.rim weld to be made.

It is among the objects of my present improvements to provide within acasing a true llet member which is separately welded both to the casingand to the supporting plate near the edge.

of a slot. This arrangement is adaptable to brackets for supporting topor crown plates, and

to tie plates. It not only provides a secure fas.

tening between the casing and the supporting plate but reinforces eachof them and particularly'compensates for the weakening. effect in thecasing due to a slot therein.

In the preferred arrangement a round rod is placed in both internalcorners formed at 'the vertical edges of la slot by the casing wall andthe supporting plate, and. welded to both the casing and the plate. Theadded yI'lllet members and welding material electively lock thesupporting plate against any longitudinal or crosswise shiftlng and thehorizontal surface added by these members and the welding materialenable more if the load to be imposed directly upon a greater irea ofconcrete and thus reduce the shearing itrain at the metal-to-metalcontact of the plate md casing wall at the bottom of the slot. An-

Another other `.advantage which follows from vfastening the plate andcasing `together only within the casingisr that any beam attached to thesupporting plate can be placed immediately adja cent .theexternalsurface of the casing, `thus not` l5 only avoiding undesirable spacingbut permitting the edge ofthe beamA to bear directly against the column"and thus avoiding racking. This closev that the patent` shall cover bysuitable expression in the appended claim whatever features ofpatentable novelty exist in the invention disclosed. l

'A 'In the accompanying drawing: g

Figure 1 isa plan-in section, as on line |-.I of 20 Figure 2, cfa casing`provided with a tie plate in accordance with my improvements;

Figure 2 is a vertical section as on line 2-2 of lFigure 1; I

'Figure `3 is a top View in sectionl as` on line 25 3-3 of Figure 4 ofafcasing provided with a` bracket and embodying my invention;

Figure fl is a vertical section as on line 4--4 of Figure 3; f f

vFigure 5 is a horizontal section showing how 30'v a bracket or tieplate which extends on only one side of the casing may be secured inaccordance with my invention; and Figure: 6 is another horizontalsection yshowing how one bracket or tie plate may extend on op- 35posite sides'of a casing and another bracket or tie plate may extendtherefrom on a third side.

Referring to the drawing and more particularly to Figures land 2, ametal casing vl is provided with diagonally opposed vertical slots 2 inits 40 zV wall. A tie plate 3 is vinserted in these slots so as` toextend on opposite sides of the casing. At each inner corner, a filletmember! is separately welded to the inner surfaceof the casing wall andY x to the tie plate as indicated at 5 and 6. The lil1et'45 member maybe a bar of rectangular cross-sec` tion, but I prefer to use a piece ofround bar stock..

as shown. y f 'I'here are advantages gained in using the;

round `bar stock. As compared to a square or- 50 rectangular bar ofcorresponding size, the round bar gives a greater surface for welding onboth'v the casing and the supporting plate as well as on itself. It alsoenables.` the welding material to be applied to the casingwall alittlecloser to 55 Ii Hf the slot and thus enhances the reinforcing effect onthe casing Wall.

In Figures 3 and 4 the same arrangement of fillet members and Welds areshown applied to a bracket? inserted in slots 2a cut at the end of acasing.

`Figure 5 shows my improved fastening when a supporting plate 8, whichmay of course be either a bracket or tie plate, is 'to extend on onlyone side of the casing.` This plate is inserted through a vertical slot2li in the casing and butted against the inner oppositesurface of thecasing 'to which it may be directly Welded. The lllet members l areinserted and welded adjacent the slot to the casing and to thesupporting, plate` as previously described. i

In Figure 6 l have illustrated theapplication ofmy invention to asupporting platee (which again may be a tie plate as shownin Figures. l`

and 2 or a bracket as shown inligures 3 and 4)' which entends onopposite sides ofvv a casing through diagonally opposed slots 2c, andanother' supporting plate lil which vextends through a third slot Eri.This latter-plate is butted against the-supporting plate B. and weldeddirectly thereto. v'Fillet members fl are Welded to both plates and theeasing as hereinbefcre described.

By use of fillet Imembers as disclosed herein,

not only is a supporting plate rmly secured to the casing against anylongitudinal movementl slots are cut at its upper end as` shown inFigures 3 and Yll. The result is a simple but exceedingly efficientarrangement Aof casing and supporting plates. f

I'claim:

A structural column comprising a tubular metal casing adapted to standupright and having a.

' vertical `slot cut therein; a metal supporting plate rextending fromoutside said casing through said slot with its bottom edge resting onthe bottom of' saidtslot; a piece of round metal rod, of lengthapproximately equal to the vertical extent of said vsupporting plate,positioned inside the casing in the verticall corner formed by the saidplate and the casing'adjacent one edge of said slot; the

'saidrod having Vertical line contact with the inside surfaces of saidplate and said casing; a fillet weld between said rod and said plate;and anotheriillet Weld betweensaid rod and the casing;` the said Weldsextending throughout the Vertical lengthof said rod and being of suchthicknessr and shape as to form with the rod a substantially ilatcontinuous surface between said plate and said casing. v l

GEORGE H. DEAN.

